What is the economic impact of too much calcium ions in a given source of water?

Water with high levels of calcium ions is referred to as hard water. While hard water has health benefits, this type of water has economic implications in the industry and households too.  In the industry, hard water can cause a breakdown of equipment such as boilers, over time. In the household, too much soap is used when washing with hard water than soft water. Therefore hard water requires to be softened before industrial use. Economically, this increases the cost of production.

answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;